i 4 T. OKADA 



Clypeus velvety black. Front anteriorly somewhat swollen above, parallel-sided, matt greyish 

 brown, with two pairs of deep brownish black longitudinal stripes, lateral pair on anterior half 

 of front, median pair posteriorly divergent and reaching occiput ; eye margin narrowly white. 

 Occiput black, grey pollinose. Face black, silvery grey pollinose. Carina large but low. 

 Cheeks very narrow, white. Vibrissae fine, no succeeding orals. 



Mesonotum dark greyish black, with two pairs of bluish white posteriorly narrowing longitudi- 

 nal stripes, median pair occupying anterior half of mesonotum. Scutellum greyish brown, 

 setigerous. Thoracic pleura with two long bristles and about ten minute hairs. Two long 

 humerals, upper slightly longer. Prescutellars well developed, two-thirds length of posterior 

 dorsocentrals. Acrostichal hairs in six rows. Anterior dorsocentrals about one-third length 

 of posteriors, distance between anterior pair of dorsocentrals about one and a half times distance 

 between anterior and posterior pairs. Anterior scutellars long, divergent ; posteriors diver- 

 gent, two-thirds length of anteriors. Only one long sternopleural. Legs yellow, tarsi and 

 apices of femora and tibiae somewhat fuscous. Fore femur with a row of about ten black 

 hooklets anteroventrally on distal half. Coxa greyish white. All metatarsi as long as two 

 succeeding tarsal segments. Mid tibia without long setae anteriorly. Preapicals on all tibiae ; 

 apicals prominent on mid leg. Wing hyaline, costa reaching M ; R 2 + 3 gently upcurved, straight 

 where it meets costa. C-index about 5-0 ; 4V-index about o-6 ; ^C-index about 0-3 ; 5x-index 

 about 0-5 ; Ac-index about 0-9. Ci-bristles two ; C3-fringe on basal three-fifths. Halteres 

 white, basally yellow. Abdominal tergites greyish black, laterally paler ; 1-2T white, with 

 yellowish grey laterally broadened anterior cross bands ; 3-6T with a pair of bluish grey 

 triangular spots on anterior borders. Cercus elongate. 



Arun Valley, east shore of River Arun below Tumlingtar, evergreen shrubs, 

 bordering dry stream-beds, c. 1,800', 14-23. xii.1961, 1 $ (R.L.C.). 



Distribution : Nepal (new locality), Java, Sumatra, Moluccas, New Guinea. 



Slightly different from the original form as re-described by de Meijere (1908), in 

 having median pair of pale mesonotal stripes anteriorly almost equally distant from 

 each other and from lateral pair (nearer to each other than to lateral pair in the 

 original form). 



Family DROSOPHILIDAE 



Key to Genera 



1 Posterior reclinate orbital nearer to inner vertical than to proclinate. Anterior 



reclinate orbital nearly as long as proclinate. Discal and second basal cells 

 usually separated (if confluent, costa with several thorn-like warts on the lower 

 surface of the third section) . Prescutellars present . (STEGANINAE) 2 



- Posterior reclinate orbital nearer to proclinate than to inner vertical. Anterior 



reclinate orbital usually shorter than proclinate. Discal and second basal cells 

 confluent. Costa without thorn-like warts on the third section. Prescutellars 

 usually absent (DROSOPHILINAE) 3 



2 Discal and second basal cells separated. Mid tibia with a row of long stout bristles 



dorsally. i? 4 -(-5 and M strongly convergent distally. . . STEGANA (p. 15) 



- Discal and second basal cells confluent. Mid tibia without a row of long stout 



bristles dorsally. J? 4 _j_ 5 and M not strongly convergent distally 



LEUCOPHENGA (p. 17) 



3 Face flat, without true carina. Postverticals minute. Anal vein abbreviated 



DIATHONEURA (p. 65) 



- Face with carina ............ 4 



4 Periorbit much broadened anteriorly. Anterior reclinate orbital fine. Anterior 



dorsocentrals situated near suture . . . MICRODROSOPHILA (p. 37) 



